This fertility goddess mug appears to have been created by a ceramicist in Mexico City, and was likely used by the Mauna Loa there. The mug has a black, semi-matte glaze, and is of a woman down to mid-calf. The arms are separated from the body and clasped in front, and there are swirl details on the back. Another version of this mug has less detail, and is marked Mauna Loa.